DE2252893A1 - ELECTROLYTE CAPACITOR - Google Patents

Description

Electrolytic capacitor

The invention relates to an electrolytic capacitor with a container having at least one opening, in which a capacitor body having an opening at least at one of its ends is arranged, and which has a seal that closes its opening has through which at least one line or a connection of the capacitor body extends, with to which the capacitor body can be electrically connected.

Many electrolytic capacitors are exposed to mechanical vibrations to a greater or lesser extent. Particularly

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high vibrations occur e.g. in spray painting systems. The vibrations are often three or ten times larger than that of starting circuits for AC motors. With AC motors, capacitor damage is usually caused by vibration thereby avoided that tar or asphalt is introduced into the bottom of the condenser body. Pure applications, However, those exposed to greater vibrations, such as in spray painting systems, are additional vibration damping Constructions required.

In addition, electrolytic capacitors require space for gas expansion so that the capacitor gradually releases gas that forms in it during its operation without causing an explosion.

Another important requirement is thermal conductivity. When the condenser is warmed up, the heat must escape through the condenser container. ·. airch can. Although! Tar is not exactly the best material for thermal conductivity, its thermal conductivity is but still much larger than that of air. Arrangements using floor plugs such as those disclosed in U.S. Patents 2,856,670 and 2,758,259 are in view unsatisfactory in terms of their thermal conductivity.

The object of the invention is to create a new electrolytic capacitor of the type mentioned above, which also able to withstand very strong vibrations, which has sufficient thermal conductivity to dissipate the during heat generated during its operation and the external

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which during its operation the expansion or an escape Sound gas allows.

In an electrolytic capacitor of the type mentioned, this object is achieved according to the invention in that an anti-vibration element between the capacitor body and the seal is arranged having a shaft which extends at least partially within the opening of the capacitor body "is located, and that the anti-vibration, supply element has several clubs with which the Anti-vibration element is supported on the side walls of the container and thus the capacitor body in connection brings with the bottom of the container and a relative movement between the two is reduced or prevented.

With the help of this anti-vibration element according to the invention is in simple and di, e other good heat conduction properties as well as the design features that allow gas to escape, which have not been influenced so far To achieve unprecedented vibration resistance in an electrolytic capacitor.

The invention is illustrated by means of one in the drawing Embodiment explained in more detail. In detail demonstrate: ·

Pig. 1 is a sectional representation through the inventive Electrolytic capacitor,

Pig. 2 is a view of one used as an im table vibration element Embodiment of an anchoring

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pen as used "in the present invention ", and

FIG. 3 shows a sectional view from above along the line III-III in FIG. 1.

As can be seen from FIG. 1, an electrolytic capacitor 10 according to the invention has one made of metal, one Metal alloy or a thermoplastic plastic manufactured container or pot 11 on. It is preferably made of a thermoplastic material because of the Economics and the easy manufacturing method. On the other hand, if the container is to be used as an electrical one at the same time Serve connection, so will of course a metal or a metal alloy with a sufficient electrical conductivity for the container 11 used. A capacitor body 12 is located inside the container 11 arranged. The capacitor body 12 preferably has a plurality of metal electrodes 121 and 122 between spacers 123 include. These spacers are preferably more known with a liquid electrolyte Soaked composition.

A heat-conducting and vibration-damping mass 13 is preferably provided on the bottom part of the container, in order to reduce or prevent oscillation of the capacitor body 12 relative to the container 11. Also can the heat developed in the condenser body through this Material and are released through the container 11 to the environment. Examples of suitable materials are Alumina compositions, tar and asphalt. But it can

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- thermally conductive polymeric materials are also used, as long as these can be produced economically.

The upper part of the container is for the arrangement of a Seal 20 formed in this. The container can have a shoulder 111 or a pinch or crank. The seal 20 has a relatively rigid upper part 21 *, for example made of metal or a thermoplastic Plastic such as phenolic resin. If desired, one or more ventilation holes 22 can be in this upper Part to be provided. The seal also has a lower part '23 made of a resilient material such as Example of natural or synthetic rubber. If desired, this lower part can be in the neighborhood of the Ventilation holes 22 are partially or completely perforated. There is one for many applications However, perforation is not necessary, since a sufficiently high pressure is reached within the container the elastic material is perforated anyway in order to allow the desired gas discharge to the environment without the Cause danger of explosion.

A special anti-vibration element or pin JO is arranged between the capacitor body 12 and the seal 20. As can be seen from FIG. 2, the anti-vibration element 30 has a rod or a shaft 31 which has a tapered portion 32 which is preferably of a smaller diameter or cross section. has to introduce the anti-vibration element into the opening 124 of the capacitor body 12 to facilitate.

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The shaft also has an upper part 33 which serves to create additional ventilation space, when this, as shown in FIG. 1, is supported on the seal 20. The anti-vibration element has also several clubs 3 ^ and 35, which are the same or can have different shapes, the latter being shown in the drawing.

The anti-vibration element is made of an elastic plastic material. As can be seen from FIG. 1, the lobes yv and 35 are supported on the wall parts of the container 11 and are curved concavely upwards, since they have a slightly larger diameter than that of the container 11. Of course, the shape of the lobes for non-cylindrical containers is modified in a suitable manner, but a prostitute must always be somewhat larger in order to achieve a fixed distance. The lobes and the extension 33 hold the capacitor body 12 in fixed connection with the bottom of the container and avoid movement in the longitudinal direction. Preferably, the bewitched has a rib 112 which cooperates with the clubs to ensure a firm anchorage.

As can be seen from Fig. 3, two or more connections and / or electrical lines between the lobes 3 ^ and 35 and up to the seal 20 be performed as it belongs to the state of the art. As can be seen from FIG. 1, such a connection is 125 connected to a connecting rivet 127.

While two such connections are shown in Fig. 3,

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can of course at least two additional connections called the arrangement shown in Figs ". In addition, the number of clubs can be changed as desired and a sufficient number Number of ports can be provided for any number of connections desired. Also can Bores are provided in the lobes and the connections are passed through these. But it can • A metal container can also be used and a connection made from the base of the container, as is the case already belongs to the state of the art.

When assembling the electrolytic capacitor according to the invention, the connections are first made with a rivet or a other connecting element 126 welded together or otherwise connected, after which the vibration-damping and thermally conductive material 13 in the container in flowable State is introduced. Then the anti-vibration element 30 is inserted into the opening 124 of the capacitor body 12 and the entire arrangement is inserted into the container. The material 13 solidifies and / or hardens along the sides of the capacitor body and the container like this is shown. Appropriate dimensions automatically place the lobes 34 and / or 35 in the appropriate one Position below the seal 20 firmly.

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Claims (12)

DIPL-ING. A. GRÜNECKER DR-ING. H. KINKELDEY DR.-ING. W. STOCKMAIR, Ae. E. «cauf.inst oftechnj PATENT LAWYERS O PH 5375 - 3M / We 8000 MÖNCHEN 27 Maximilianilrofi «43 Telephone 297100/27 £ 744 / 22It 71 Telegrams Monapal Munich Telex 05-28380 2 Oct. 7, 1972 Claims 'Y1. ^ Electrolytic capacitor with at least one opening having container, in which at least at one of its ends an opening on v / iron capacitor body is arranged, and which has a seal closing its opening, through the at least one line or a connection of the capacitor body extends through it, m.ii; those of the capacitor body electrically can be connected, characterized in that that between the capacitor body (12) and the seal (20) an anti-vibration element (30) is arranged which has a shaft (31) which extends at least partially within the opening (124) of the capacitor body is located, and that the anti-vibration element has several lobes (34-, 35) with which the anti-vibration element on the side walls of the container (11) and thus brings the capacitor body in connection with the bottom of the container and a relative movement between the two is reduced or prevented. 2. Electrolytic capacitor according to claim 1, characterized in that between the capacitor body (12) and the container (11) in its lower part 3098 1 9/0797 ζ - a heat-conducting and vibration-damping material
(13) is arranged. 3. electrolytic capacitor according to claim 1 or 2, characterized characterized in that the anti-vibration element (30) has an upper shaft part (33) which is supported on the bottom (23) of the seal (20). 4. Electrolytic capacitor according to one of claims 1 to 3? characterized in that the electrical connections (125) for the capacitor body (12)
at least partially through or between the clubs 35) extend through it. 5. electrolytic capacitor according to one of claims 1 to 4, characterized in that. the anti-vibration element (30) is made of plastic. 6. Electrolytic capacitor according to one of claims 1 to 5 » characterized in that the container (11) has a shoulder (111) for receiving in its upper part the seal (20) has. 7. electrolytic capacitor according to one of claims 1 to 6, characterized in that the container (11) is made of a metal, a metal alloy or a plastic. 8. electrolytic capacitor according to one of claims 1 to 7, j characterized in that the shaft (31) an insertion part (32) with a tapered cross section Has. 309819/0797 9. electrolytic capacitor according to claim 8, characterized in that the tapered cross section is circular. 10. Electrolytic capacitor according to one of claims 1 to 9, characterized in that the lobes (34 * 35) inside the container (11) are concave upwards are bent. 11. electrolytic capacitor according to claim 7 »thereby g e mark ei chne t that the container (11) is made of metal and acts as an electrical connection. 12. electrolytic capacitor according to claim 6, characterized in that the lobes (34-, 35) on the shoulder (111) inside the container (11). 30981 9/0797